incandescent lamp
Lamp in which a filament heated by an electric current produces light rays.
inert gas 
Gas inserted in the bulb to slow down evaporation of the filament.
base 
Metal end of a lightbulb inserted into a socket to connect it to the electric circuit.
exhaust tube 
Glass tube used to empty the air from the bulb and then to fill it with inert gas before it is sealed.
heat deflecting disc 
Metal disc placed at the entrance of a lamp’s neck to protect the pinch and the base from the heat.
filament 
Very thin metal wire, usually made of tungsten, emitting light rays when an electric current passes through it.
bayonet base 
Base fitted with two short metal pins so that it can be placed in the corresponding socket.
screw base 
Base fitted with a screw pitch so it can be inserted into the corresponding socket.
bulb 
Gas sealed in a glass envelope into which the luminous body of a lamp is inserted.